The HBO star recently opened up to Parade magazine about the support he receives from his famous family. Huston is the son of Lady Margot Lavinia Cholmondeley and Walter Anthony Huston. His paternal grandfather is the late director John Huston and his maternal grandfather was the late Hugh Cholmondeley, 6th Marquess of Cholmondeley. Huston is also the nephew of actors Anjelica Huston and Danny Huston.

"They're massively supportive. They're the best. I'm so lucky to have such a great family," he said. "I respect them so much professionally, and they've been unconditionally supportive in the choices that I've made. It's been very good having them on my side."